Tech

February 6, 2013

New water jets could propel LCS to greater speeds

onr-water-jetsThe Navy’s fifth Littoral Combat Ship, Milwaukee, will be the first to benefit from new high-power density water jets aimed at staving off rudder and propeller damage experienced on high-speed ships.

The product of an Office of Naval Research Future Naval Capabilities program, the waterjets arrived last month at the Marinette Marine shipyard in Wisconsin, where Milwaukee (LCS 5) is under construction.

“We believe these waterjets are the future,” said Dr. Ki-Han Kim, program manager in ONR’s Ship Systems and Engineering Research Division. “Anything that we can do to keep ships ready to go will ultimately benefit our war fighters.”

Chief of Naval Operations Adm. Jonathan Greenert’s 2013-2017 Navigation Plan calls for fielding improved ships to support counterterrorism and irregular warfare missions at sea and ashore. The LCS will play a big role in the Navy’s plan as a modular, adaptable vessel for use against diesel submarines, littoral mines and attacks by small surface craft.

Developed by Rolls-Royce Naval Marine in Walpole, Mass., in collaboration with ONR and Naval Surface Warfare Center, Carderock Division, the new Axial-Flow Waterjet Mk-1 can move nearly half a million gallons of seawater per minute, providing more thrust per unit than current commercial water jets. Four of the new water jets will propel the LCS to speeds greater than 40 knots.

Researchers believe the smaller, more efficient wate jets will help the LCS avoid excessive maintenance costs associated with cavitation — a phenomenon that occurs when changes in pressure create air bubbles on rotating machinery, such as marine propellers. Repeated occurrences can cause whole chunks of metal to wear away, leading to frequent repairs and replacements.

The water jets’ new design could increase their lifespan between repairs.

The FNC program that oversaw development of this technology proved to be as adaptable as LCS. The water jets originally were slated to benefit another ship program that was discontinued. Instead of cancelling the water jets program, officials regrouped and shifted their focus to designing a product that would improve the performance of LCS.

ONR’s FNC program saves taxpayer money by streamlining processes to deliver cutting-edge products within five years. The water jets project began in 2007, and the delivery last month to the shipyard marked its successful completion.

Next up for the water jets will be full-scale sea trials on Milwaukee (LCS 5), expected to occur in the next 24 months.

Eventually, the water jets could end up on 10 LCS under contract to be built by Lockheed Martin.

The Department of the Navy’s Office of Naval Research provides the science and technology necessary to maintain the Navy and Marine Corps’ technological advantage. Through its affiliates, ONR is a leader in science and technology with engagement in 50 states, 70 countries, 1,035 institutions of higher learning and 914 industry partners. ONR employs approximately 1,400 people, comprising uniformed, civilian and contract personnel, with additional employees at the Naval Research Lab in Washington, D.C.

 




All of this week's top headlines to your email every Friday.


 
 

 

Headlines July 7, 2015

News: F-35 loses dogfight to fighter jet from 1980s – A new report alleges that an F-35A was defeated by the very aircraft it is meant to replace.   Business: South Korea selects Airbus for $1.33 billion tanker contract – European aerospace giant Airbus won a $1.33 billion deal June 30 to supply air refueling...
 
 
U.S. Chamber of Commerce photograph

Boeing, Embraer to collaborate on ecoDemonstrator technology tests

U.S. Chamber of Commerce photograph Frederico Curado, president & CEO of Embraer, and Marc Allen, president of Boeing International, at the Brazil-U.S. Business Summit in Washington, D.C. The event occurred during an offici...
 
 
Untitled-2

Tactical reconnaissance vehicle project eyes hoverbike for defense

The U.S. Army Research Laboratory, or ARL, has been exploring the tactical reconnaissance vehicle, or TRV, concept for nearly nine months and is evaluating the hoverbike technology as a way to get Soldiers away from ground thre...
 

 
Air Force photograph by SSgt. William Banton

Upgraded AWACS platform tested at Northern Edge

Air Force photograph by SSgt. William Banton Maintenance crew members prepare an E-3G Sentry (AWACS) for takeoff during exercise Northern Edge June 25, 2015. Roughly 6,000 airmen, soldiers, sailors, Marines and Coast Guardsmen ...
 
 
LM-Legion

Lockheed Martin’s Legion Pod™ takes to skies

Lockheed Martin photograph by Randy Crites Lockheed Martin’s Legion Pod recently completed its first flight test, successfully tracking multiple airborne targets while flying on an F-16 in Fort Worth, Texas. Legion Pod was in...
 
 
Air Force photograph by SSgt. Marleah Robertson

First Marine graduates Air Force’s F-35 intelligence course

Air Force photograph by SSgt. Marleah Robertson Marine Corps 1st Lt. Samuel Winsted, an F-35B Lightning II intelligence officer, provides a mock intelligence briefing to two instructors during the F-35 Intelligence Formal Train...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>